Merge branch 'element-bitmaps'

src/Artemis.Core/Models/Profile/EffectProfileElement.cs

@@ -5,21 +5,39 @@ using System.Linq;
 using Artemis.Core.Annotations;
 using Artemis.Core.Plugins.LayerEffect.Abstract;
 using Artemis.Storage.Entities.Profile;
-using SkiaSharp;
 
 namespace Artemis.Core.Models.Profile
 {
     public abstract class EffectProfileElement : PropertiesProfileElement
     {
-        internal abstract EffectsEntity EffectsEntity { get; }
-
         protected List<BaseLayerEffect> _layerEffects;
+        internal abstract EffectsEntity EffectsEntity { get; }
 
         /// <summary>
         ///     Gets a read-only collection of the layer effects on this entity
         /// </summary>
         public ReadOnlyCollection<BaseLayerEffect> LayerEffects => _layerEffects.AsReadOnly();
 
+        protected void ApplyLayerEffectsToEntity()
+        {
+            EffectsEntity.LayerEffects.Clear();
+            foreach (var layerEffect in LayerEffects)
+            {
+                var layerEffectEntity = new LayerEffectEntity
+                {
+                    Id = layerEffect.EntityId,
+                    PluginGuid = layerEffect.PluginInfo.Guid,
+                    EffectType = layerEffect.GetType().Name,
+                    Name = layerEffect.Name,
+                    Enabled = layerEffect.Enabled,
+                    HasBeenRenamed = layerEffect.HasBeenRenamed,
+                    Order = layerEffect.Order
+                };
+                EffectsEntity.LayerEffects.Add(layerEffectEntity);
+                layerEffect.BaseProperties.ApplyToEntity();
+            }
+        }
+
         internal void RemoveLayerEffect([NotNull] BaseLayerEffect effect)
         {
             if (effect == null) throw new ArgumentNullException(nameof(effect));
@@ -53,44 +71,6 @@ namespace Artemis.Core.Models.Profile
             effect.Dispose();
         }
 
-        internal SKPath CreateShapeClip()
-        {
-            var shapeClip = new SKPath();
-            if (Path == null)
-                return shapeClip;
-
-            if (Parent is EffectProfileElement effectParent)
-                shapeClip = shapeClip.Op(effectParent.CreateShapeClip(), SKPathOp.Union);
-
-            foreach (var baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-            {
-                var effectClip = baseLayerEffect.InternalCreateShapeClip(Path);
-                shapeClip = shapeClip.Op(effectClip, SKPathOp.Difference);
-            }
-
-            return shapeClip;
-        }
-
-        protected void ApplyLayerEffectsToEntity()
-        {
-            EffectsEntity.LayerEffects.Clear();
-            foreach (var layerEffect in LayerEffects)
-            {
-                var layerEffectEntity = new LayerEffectEntity
-                {
-                    Id = layerEffect.EntityId,
-                    PluginGuid = layerEffect.PluginInfo.Guid,
-                    EffectType = layerEffect.GetType().Name,
-                    Name = layerEffect.Name,
-                    Enabled = layerEffect.Enabled,
-                    HasBeenRenamed = layerEffect.HasBeenRenamed,
-                    Order = layerEffect.Order
-                };
-                EffectsEntity.LayerEffects.Add(layerEffectEntity);
-                layerEffect.BaseProperties.ApplyToEntity();
-            }
-        }
-
         #region Events
 
         public event EventHandler LayerEffectsUpdated;

src/Artemis.Core/Models/Profile/Folder.cs

@@ -9,6 +9,8 @@ namespace Artemis.Core.Models.Profile
 {
     public sealed class Folder : EffectProfileElement
     {
+        private SKBitmap _folderBitmap;
+
         public Folder(Profile profile, ProfileElement parent, string name)
         {
             FolderEntity = new FolderEntity();
@@ -74,36 +76,49 @@ namespace Artemis.Core.Models.Profile
             }
         }
 
-        public override void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint)
+        public override void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo)
         {
-            if (!Enabled)
+            if (!Enabled || Path == null || !Children.Any(c => c.Enabled))
                 return;
             
-            if (Path == null)
+            if (_folderBitmap == null)
-                return;
+                _folderBitmap = new SKBitmap(new SKImageInfo((int) Path.Bounds.Width, (int) Path.Bounds.Height));
+            else if (_folderBitmap.Info.Width != (int) Path.Bounds.Width || _folderBitmap.Info.Height != (int) Path.Bounds.Height)
+            {
+                _folderBitmap.Dispose();
+                _folderBitmap = new SKBitmap(new SKImageInfo((int) Path.Bounds.Width, (int) Path.Bounds.Height));
+            }
 
-            canvas.Save();
+            using var folderCanvas = new SKCanvas(_folderBitmap);
-            canvas.ClipPath(Path);
+            using var folderPaint = new SKPaint();
+            folderCanvas.Clear();
 
-            // Clone the paint so that any changes are confined to the current group
+            var folderPath = new SKPath(Path);
-            var groupPaint = paint.Clone();
+            folderPath.Transform(SKMatrix.MakeTranslation(folderPath.Bounds.Left * -1, folderPath.Bounds.Top * -1));
 
-            // Pre-processing only affects other pre-processors and the brushes
-            canvas.Save();
             foreach (var baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                baseLayerEffect.InternalPreProcess(canvas, canvasInfo, new SKPath(Path), groupPaint);
+                baseLayerEffect.PreProcess(folderCanvas, _folderBitmap.Info, folderPath, folderPaint);
 
             // Iterate the children in reverse because the first layer must be rendered last to end up on top
             for (var index = Children.Count - 1; index > -1; index--)
             {
                 var profileElement = Children[index];
-                profileElement.Render(deltaTime, canvas, canvasInfo, groupPaint);
+                profileElement.Render(deltaTime, folderCanvas, _folderBitmap.Info);
             }
 
-            // Restore the canvas as to not be affected by pre-processors
+            var targetLocation = Path.Bounds.Location;
-            canvas.Restore();
+            if (Parent is Folder parentFolder)
+                targetLocation -= parentFolder.Path.Bounds.Location;
+
+            canvas.Save();
+
+            var clipPath = new SKPath(folderPath);
+            clipPath.Transform(SKMatrix.MakeTranslation(targetLocation.X, targetLocation.Y));
+            canvas.ClipPath(clipPath);
+
             foreach (var baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                baseLayerEffect.InternalPostProcess(canvas, canvasInfo, new SKPath(Path), groupPaint);
+                baseLayerEffect.PostProcess(canvas, canvasInfo, folderPath, folderPaint);
+            canvas.DrawBitmap(_folderBitmap, targetLocation, folderPaint);
 
             canvas.Restore();
         }
@@ -186,6 +201,9 @@ namespace Artemis.Core.Models.Profile
 
         internal void Deactivate()
         {
+            _folderBitmap?.Dispose();
+            _folderBitmap = null;
+
             var layerEffects = new List<BaseLayerEffect>(LayerEffects);
             foreach (var baseLayerEffect in layerEffects)
                 DeactivateLayerEffect(baseLayerEffect);

src/Artemis.Core/Models/Profile/Layer.cs

@@ -25,6 +25,7 @@ namespace Artemis.Core.Models.Profile
     {
         private LayerShape _layerShape;
         private List<ArtemisLed> _leds;
+        private SKBitmap _layerBitmap;
 
         internal Layer(Profile profile, ProfileElement parent, string name)
         {
@@ -225,7 +226,7 @@ namespace Artemis.Core.Models.Profile
         }
 
         /// <inheritdoc />
-        public override void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint)
+        public override void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo)
         {
             if (!Enabled)
                 return;
@@ -237,77 +238,86 @@ namespace Artemis.Core.Models.Profile
             if (LayerBrush?.BaseProperties?.PropertiesInitialized == false || LayerBrush?.BrushType != LayerBrushType.Regular)
                 return;
 
-            canvas.Save();
+            if (_layerBitmap == null)
-            canvas.ClipPath(Path);
+                _layerBitmap = new SKBitmap(new SKImageInfo((int)Path.Bounds.Width, (int)Path.Bounds.Height));
+            else if (_layerBitmap.Info.Width != (int)Path.Bounds.Width || _layerBitmap.Info.Height != (int)Path.Bounds.Height)
+            {
+                _layerBitmap.Dispose();
+                _layerBitmap = new SKBitmap(new SKImageInfo((int)Path.Bounds.Width, (int)Path.Bounds.Height));
+            }
 
-            paint.BlendMode = General.BlendMode.CurrentValue;
+            using var layerCanvas = new SKCanvas(_layerBitmap);
-            paint.Color = new SKColor(0, 0, 0, (byte) (Transform.Opacity.CurrentValue * 2.55f));
+            using var layerPaint = new SKPaint
+            {
+                FilterQuality = SKFilterQuality.Low,
+                BlendMode = General.BlendMode.CurrentValue,
+                Color = new SKColor(0, 0, 0, (byte) (Transform.Opacity.CurrentValue * 2.55f))
+            };
+            layerCanvas.Clear();
+
+            var layerPath = new SKPath(Path);
+            layerPath.Transform(SKMatrix.MakeTranslation(layerPath.Bounds.Left * -1, layerPath.Bounds.Top * -1));
             
-            // Pre-processing only affects other pre-processors and the brushes
-            canvas.Save();
             foreach (var baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                baseLayerEffect.InternalPreProcess(canvas, canvasInfo, new SKPath(Path), paint);
+                baseLayerEffect.PreProcess(layerCanvas, _layerBitmap.Info, layerPath, layerPaint);
 
-            // Shape clip must be determined before commiting to any rendering
+            layerCanvas.ClipPath(layerPath);
-            var shapeClip = CreateShapeClip();
-            if (!shapeClip.IsEmpty)
-                ExcludePathFromTranslation(shapeClip);
 
             if (!LayerBrush.SupportsTransformation)
-                SimpleRender(canvas, canvasInfo, paint, shapeClip);
+                SimpleRender(layerCanvas, _layerBitmap.Info, layerPaint, layerPath);
             else if (General.FillType.CurrentValue == LayerFillType.Stretch)
-                StretchRender(canvas, canvasInfo, paint, shapeClip);
+                StretchRender(layerCanvas, _layerBitmap.Info, layerPaint, layerPath);
             else if (General.FillType.CurrentValue == LayerFillType.Clip)
-                ClipRender(canvas, canvasInfo, paint, shapeClip);
+                ClipRender(layerCanvas, _layerBitmap.Info, layerPaint, layerPath);
 
-            // Restore the canvas as to not be affected by pre-processors
-            canvas.Restore();
             foreach (var baseLayerEffect in LayerEffects.Where(e => e.Enabled))
-                baseLayerEffect.InternalPostProcess(canvas, canvasInfo, new SKPath(Path), paint);
+                baseLayerEffect.PostProcess(layerCanvas, _layerBitmap.Info, layerPath, layerPaint);
 
-            canvas.Restore();
+            var targetLocation = new SKPoint(0, 0);
+            if (Parent is Folder parentFolder)
+                targetLocation = Path.Bounds.Location - parentFolder.Path.Bounds.Location;
+
+            canvas.DrawBitmap(_layerBitmap, targetLocation, layerPaint);
         }
 
-        private void SimpleRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint, SKPath shapeClip)
+        private void SimpleRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint, SKPath layerPath)
         {
-            var path = LayerShape.Path.Op(shapeClip, SKPathOp.Difference);
+            LayerBrush.InternalRender(canvas, canvasInfo, new SKPath(LayerShape.Path), paint);
-            LayerBrush.InternalRender(canvas, canvasInfo, path, paint);
         }
 
-        private void StretchRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint, SKPath shapeClip)
+        private void StretchRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint, SKPath layerPath)
         {
             // Apply transformations
             var sizeProperty = Transform.Scale.CurrentValue;
             var rotationProperty = Transform.Rotation.CurrentValue;
 
-            var anchorPosition = GetLayerAnchorPosition();
+            var anchorPosition = GetLayerAnchorPosition(layerPath);
             var anchorProperty = Transform.AnchorPoint.CurrentValue;
 
             // Translation originates from the unscaled center of the shape and is tied to the anchor
-            var x = anchorPosition.X - Bounds.MidX - anchorProperty.X * Bounds.Width;
+            var x = anchorPosition.X - layerPath.Bounds.MidX - anchorProperty.X * layerPath.Bounds.Width;
-            var y = anchorPosition.Y - Bounds.MidY - anchorProperty.Y * Bounds.Height;
+            var y = anchorPosition.Y - layerPath.Bounds.MidY - anchorProperty.Y * layerPath.Bounds.Height;
 
             // Apply these before translation because anchorPosition takes translation into account
             canvas.RotateDegrees(rotationProperty, anchorPosition.X, anchorPosition.Y);
             canvas.Scale(sizeProperty.Width / 100f, sizeProperty.Height / 100f, anchorPosition.X, anchorPosition.Y);
             canvas.Translate(x, y);
             
-            var path = LayerShape.Path.Op(shapeClip, SKPathOp.Difference);
+            LayerBrush.InternalRender(canvas, canvasInfo, new SKPath(LayerShape.Path), paint);
-            LayerBrush.InternalRender(canvas, canvasInfo, path, paint);
         }
 
-        private void ClipRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint, SKPath shapeClip)
+        private void ClipRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint, SKPath layerPath)
         {
             // Apply transformation
             var sizeProperty = Transform.Scale.CurrentValue;
             var rotationProperty = Transform.Rotation.CurrentValue;
 
-            var anchorPosition = GetLayerAnchorPosition();
+            var anchorPosition = GetLayerAnchorPosition(layerPath);
             var anchorProperty = Transform.AnchorPoint.CurrentValue;
 
             // Translation originates from the unscaled center of the shape and is tied to the anchor
-            var x = anchorPosition.X - Bounds.MidX - anchorProperty.X * Bounds.Width;
+            var x = anchorPosition.X - layerPath.Bounds.MidX - anchorProperty.X * layerPath.Bounds.Width;
-            var y = anchorPosition.Y - Bounds.MidY - anchorProperty.Y * Bounds.Height;
+            var y = anchorPosition.Y - layerPath.Bounds.MidY - anchorProperty.Y * layerPath.Bounds.Height;
 
             var clipPath = new SKPath(LayerShape.Path);
             clipPath.Transform(SKMatrix.MakeTranslation(x, y));
@@ -329,7 +339,6 @@ namespace Artemis.Core.Models.Profile
             var renderPath = new SKPath();
             renderPath.AddRect(boundsRect);
 
-            renderPath = renderPath.Op(shapeClip, SKPathOp.Difference);
             LayerBrush.InternalRender(canvas, canvasInfo, renderPath, paint);
         }
 
@@ -357,54 +366,20 @@ namespace Artemis.Core.Models.Profile
             OnRenderPropertiesUpdated();
         }
 
-        internal SKPoint GetLayerAnchorPosition()
+        internal SKPoint GetLayerAnchorPosition(SKPath layerPath)
         {
             var positionProperty = Transform.Position.CurrentValue;
 
             // Start at the center of the shape
-            var position = new SKPoint(Bounds.MidX, Bounds.MidY);
+            var position = new SKPoint(layerPath.Bounds.MidX, layerPath.Bounds.MidY);
 
             // Apply translation
-            position.X += positionProperty.X * Bounds.Width;
+            position.X += positionProperty.X * layerPath.Bounds.Width;
-            position.Y += positionProperty.Y * Bounds.Height;
+            position.Y += positionProperty.Y * layerPath.Bounds.Height;
 
             return position;
         }
 
-
-        /// <summary>
-        ///     Excludes the provided path from the translations applied to the layer by applying translations that cancel the
-        ///     layer translations out
-        /// </summary>
-        /// <param name="path"></param>
-        public void ExcludePathFromTranslation(SKPath path)
-        {
-            var sizeProperty = Transform.Scale.CurrentValue;
-            var rotationProperty = Transform.Rotation.CurrentValue;
-
-            var anchorPosition = GetLayerAnchorPosition();
-            var anchorProperty = Transform.AnchorPoint.CurrentValue;
-
-            // Translation originates from the unscaled center of the shape and is tied to the anchor
-            var x = anchorPosition.X - Bounds.MidX - anchorProperty.X * Bounds.Width;
-            var y = anchorPosition.Y - Bounds.MidY - anchorProperty.Y * Bounds.Height;
-
-            var reversedXScale = 1f / (sizeProperty.Width / 100f);
-            var reversedYScale = 1f / (sizeProperty.Height / 100f);
-
-            if (General.FillType == LayerFillType.Stretch)
-            {
-                path.Transform(SKMatrix.MakeRotationDegrees(rotationProperty * -1, anchorPosition.X, anchorPosition.Y));
-                path.Transform(SKMatrix.MakeScale(reversedXScale, reversedYScale, anchorPosition.X, anchorPosition.Y));
-                path.Transform(SKMatrix.MakeTranslation(x * -1, y * -1));
-            }
-            else
-            {
-                path.Transform(SKMatrix.MakeRotationDegrees(rotationProperty * -1, anchorPosition.X, anchorPosition.Y));
-                path.Transform(SKMatrix.MakeTranslation(x * -1, y * -1));
-            }
-        }
-
         #endregion
 
         #region LED management
@@ -472,6 +447,9 @@ namespace Artemis.Core.Models.Profile
 
         internal void Deactivate()
         {
+            _layerBitmap?.Dispose();
+            _layerBitmap = null;
+
             DeactivateLayerBrush();
             var layerEffects = new List<BaseLayerEffect>(LayerEffects);
             foreach (var baseLayerEffect in layerEffects)

src/Artemis.Core/Models/Profile/LayerShapes/Ellipse.cs

@@ -11,7 +11,7 @@ namespace Artemis.Core.Models.Profile.LayerShapes
         public override void CalculateRenderProperties()
         {
             var path = new SKPath();
-            path.AddOval(Layer.Bounds);
+            path.AddOval(SKRect.Create(Layer.Bounds.Width, Layer.Bounds.Height));
             Path = path;
         }
     }

src/Artemis.Core/Models/Profile/LayerShapes/Rectangle.cs

@@ -11,7 +11,7 @@ namespace Artemis.Core.Models.Profile.LayerShapes
         public override void CalculateRenderProperties()
         {
             var path = new SKPath();
-            path.AddRect(Layer.Bounds);
+            path.AddRect(SKRect.Create(Layer.Bounds.Width, Layer.Bounds.Height));
             Path = path;
         }
     }

src/Artemis.Core/Models/Profile/Profile.cs

@@ -57,7 +57,7 @@ namespace Artemis.Core.Models.Profile
             }
         }
 
-        public override void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint)
+        public override void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo)
         {
             lock (this)
             {
@@ -65,7 +65,7 @@ namespace Artemis.Core.Models.Profile
                     throw new ArtemisCoreException($"Cannot render inactive profile: {this}");
 
                 foreach (var profileElement in Children)
-                    profileElement.Render(deltaTime, canvas, canvasInfo, paint);
+                    profileElement.Render(deltaTime, canvas, canvasInfo);
             }
         }
 

src/Artemis.Core/Models/Profile/ProfileElement.cs

@@ -49,7 +49,7 @@ namespace Artemis.Core.Models.Profile
         /// <summary>
         ///     Renders the element
         /// </summary>
-        public abstract void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo, SKPaint paint);
+        public abstract void Render(double deltaTime, SKCanvas canvas, SKImageInfo canvasInfo);
 
         public List<Folder> GetAllFolders()
         {

src/Artemis.Core/Plugins/Abstract/ProfileModule.cs

@@ -26,8 +26,7 @@ namespace Artemis.Core.Plugins.Abstract
             lock (this)
             {
                 // Render the profile
-                using var paint = new SKPaint {FilterQuality = SKFilterQuality.Low};
+                ActiveProfile?.Render(deltaTime, canvas, canvasInfo);
-                ActiveProfile?.Render(deltaTime, canvas, canvasInfo, paint);
             }
         }
 

src/Artemis.Core/Plugins/LayerBrush/Abstract/LayerBrush.cs

@@ -24,11 +24,6 @@ namespace Artemis.Core.Plugins.LayerBrush.Abstract
 
         internal override void InternalRender(SKCanvas canvas, SKImageInfo canvasInfo, SKPath path, SKPaint paint)
         {
-            // Move the canvas to the top-left of the render path
-            canvas.Translate(path.Bounds.Left, path.Bounds.Top);
-            // Pass the render path to the layer brush positioned at 0,0
-            path.Transform(SKMatrix.MakeTranslation(path.Bounds.Left * -1, path.Bounds.Top * -1));
-
             Render(canvas, canvasInfo, path, paint);
         }
 

src/Artemis.Core/Plugins/LayerEffect/Abstract/BaseLayerEffect.cs

@@ -99,65 +99,6 @@ namespace Artemis.Core.Plugins.LayerEffect.Abstract
         /// <param name="paint">The paint this layer/folder used to render</param>
         public abstract void PostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint);
 
-        /// <summary>
-        ///     Allows you to return a clip that is applied to the layer shape (or in case of a folder, all layer shapes in the
-        ///     folder).
-        ///     <para>
-        ///         To avoid breaking other effects, use this instead of applying a clip to the entire canvas if you want to limit
-        ///         where shapes may render
-        ///     </para>
-        /// </summary>
-        /// <param name="renderBounds">The bounds this layer/folder rendered in</param>
-        /// <returns></returns>
-        public virtual SKPath CreateShapeClip(SKPath renderBounds)
-        {
-            return new SKPath();
-        }
-
-        internal void InternalPreProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath path, SKPaint paint)
-        {
-            var x = path.Bounds.Left;
-            var y = path.Bounds.Top;
-            // Move the canvas to the top-left of the render path
-            canvas.Translate(x, y);
-
-            // Pass the render path to the layer effect positioned at 0,0
-            path.Transform(SKMatrix.MakeTranslation(x * -1, y * -1));
-
-            PreProcess(canvas, canvasInfo, path, paint);
-
-            // Move the canvas back
-            canvas.Translate(x * -1, y * -1);
-        }
-
-        internal void InternalPostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath path, SKPaint paint)
-        {
-            var x = path.Bounds.Left;
-            var y = path.Bounds.Top;
-            // Move the canvas to the top-left of the render path
-            canvas.Translate(x, y);
-
-            // Pass the render path to the layer effect positioned at 0,0
-            path.Transform(SKMatrix.MakeTranslation(x * -1, y * -1));
-
-            PostProcess(canvas, canvasInfo, path, paint);
-
-            // Move the canvas back
-            canvas.Translate(x * -1, y * -1);
-        }
-
-        internal virtual SKPath InternalCreateShapeClip(SKPath path)
-        {
-            var x = path.Bounds.Left;
-            var y = path.Bounds.Top;
-
-            path.Transform(SKMatrix.MakeTranslation(x * -1, y * -1));
-            var shapeClip = CreateShapeClip(path);
-            if (!shapeClip.IsEmpty)
-                shapeClip.Transform(SKMatrix.MakeTranslation(x, y));
-            return shapeClip;
-        }
-
         // Not only is this needed to initialize properties on the layer effects, it also prevents implementing anything
         // but LayerEffect<T> outside the core
         internal abstract void Initialize(ILayerService layerService);

src/Plugins/Artemis.Plugins.LayerEffects.Filter/BlurEffect.cs

@@ -39,12 +39,13 @@ namespace Artemis.Plugins.LayerEffects.Filter
 
         public override void PreProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
         {
-            if (_imageFilter != null)
+          
-                paint.ImageFilter = SKImageFilter.CreateMerge(paint.ImageFilter, _imageFilter);
         }
 
         public override void PostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
         {
+            if (_imageFilter != null)
+                paint.ImageFilter = SKImageFilter.CreateMerge(paint.ImageFilter, _imageFilter);
         }
 
         private void UpdateFilterType()

src/Plugins/Artemis.Plugins.LayerEffects.Filter/DilateEffect.cs

@@ -18,6 +18,13 @@ namespace Artemis.Plugins.LayerEffects.Filter
         }
 
         public override void PreProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
+        {
+            var visualizationPath = new SKPath();
+            visualizationPath.AddOval(SKRect.Create(0, 0, renderBounds.Bounds.Width / 2, renderBounds.Bounds.Height / 2));
+            canvas.ClipPath(visualizationPath);
+        }
+
+        public override void PostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
         {
             paint.ImageFilter = SKImageFilter.CreateDilate(
                 (int) Properties.DilateRadius.CurrentValue.Width,
@@ -25,9 +32,5 @@ namespace Artemis.Plugins.LayerEffects.Filter
                 paint.ImageFilter
             );
         }
-
-        public override void PostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
-        {
-        }
     }
 }

src/Plugins/Artemis.Plugins.LayerEffects.Filter/GlowEffect.cs

@@ -18,6 +18,11 @@ namespace Artemis.Plugins.LayerEffects.Filter
         }
 
         public override void PreProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
+        {
+            
+        }
+
+        public override void PostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
         {
             paint.ImageFilter = SKImageFilter.CreateDropShadow(
                 Properties.GlowOffset.CurrentValue.X,
@@ -28,9 +33,5 @@ namespace Artemis.Plugins.LayerEffects.Filter
                 paint.ImageFilter
             );
         }
-
-        public override void PostProcess(SKCanvas canvas, SKImageInfo canvasInfo, SKPath renderBounds, SKPaint paint)
-        {
-        }
     }
 }